Preventing Titanium Threads from Cold Welding 1

DonFS · Feb 10, 2011

I am currently investigating a problem we are having with titanium threaded connections cold-welding together when screwing them together at a semi high torque which gives very high loads on the flanks.

Does anyone have a sugestion on what to use?

We feel we need a minimum of a .001" coating

Or have another method other than coating?

Thanks!

StrykerTECH · Feb 10, 2011

Can you use some sort of "never-seez"?

Like "Never Seez® High Temperature Stainless Nuclear Cert. Anti-Seize"

Specifically made for titanium alloys and such.

StrykerTECH Engineering Staff
Milwaukee, WI

http://www.stryker-tech.com/

gruntguru · Feb 10, 2011

Search for "anti-galling titanium".

Engineering is the art of creating things you need, from things you can get.

unclesyd · Feb 10, 2011

Here is several products that may interest you as an anti-seize for Titanium fasteners. The Tiodize surface treatment coupled with a dry film lubricant is excellant. Instead of Silver plating we use Swagelok Silver Goop. There is a lot of recommendations to use a Zinc base anti-seize from the motor sports world. We have used the Chemola 220 (Boron Nitride based) on some of the larger Titanium Threads. In our polymer process area where we have Titanium components we use H-11 bolts and BN lubricant under the nut landing area. This is in addition to the H-11 fasteners being coated with Dag ( colloidal graphite)

One suggestion that I've run a cross in several articles is the addition of Baking soda to a grease, usually a Lithium based grease. The ratio is above 15:,1, grease/soda. Haven't tried it but it sounds interesting.

http://www.tiodize.com/pdf/processeschapter.pdf

http://www.swagelok.com/products/leak-detectors-lubricants-se

alants/lubricants/silver-goop.aspx

http://www.superior-industries.com/_1900_anti_seize_product_238.html

http://www.socousa.com/home/Chemola/Maint/tp220.htm

http://www.zypcoatings.com/Datasheets/BnAerosol/Bn-4oz.htm